Autunite

Autunite (hydrated calcium uranyl phosphate) with formula: Ca(UO2)2(PO4)2·10-12H2O is a yellow - greenish fluorescent mineral with a hardness of 2 - 2½. Autunite crystallizes in the orthorhombic system and often occurs as tabular square crystals. Due to the moderate uranium content of 48.27% it is radioactive and also used as uranium ore. If the...
Found on http://en.wikipedia.org/wiki/Autunite

Autunite

• (n.) A lemon-yellow phosphate of uranium and calcium occurring in tabular crystals with basal cleavage, and in micalike scales. H., 2-2.5. Sp. gr., 3.05-3.19.
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Autunite

Au'tun·ite noun [ From Autun , France, its locality.] (Min.) A lemon-yellow phosphate of uranium and calcium occurring in tabular crystals with basal cleavage, and in micalike scales. H., 2-2.5. Spanish gr., 3.05-3.19.
Found on http://www.encyclo.co.uk/webster/A/150

Autunite

Autunite is a secondary mineral found in the zone of oxidation and weathering of uranite or other uranium minerals. It has strong fluorescence and is used as an ore of uranium. It has the formulae Ca(UO2)2(PO4)2ù10- 12H2O and a relative hardness of 3.
Found on http://www.probertencyclopaedia.com/browse/HA.HTM

autunite

phosphate mineral, hydrated calcium and uranium phosphate [Ca(UO2)2 (PO4)210–12H2O], that is an ore of uranium. It forms translucent to transparent, ...
Found on http://www.britannica.com/eb/a-z/a/129
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